God Tier auto-rez only works if a player is killed doing something not heroic or if the player in question doesn't deserve the death. For example:

A God Tier Mage of Void is exploring a cave for loot. He loses his footing next to a crevasse, bashes his head on a rock and falls 200 metres to his death. Was it heroic? Definitely not-- "undignified" might be a better term for the event. Was it a just death? Nope, not that either. Therefore auto-rez will kick in after a while and the Mage's crumpled remains will straighten themselves out, heal all wounds, and reanimate. The Mage will then stagger to the exit, feeling kinda freaked out that he just had a neardeath experience and berating himself over a easily preventable death.

God Tier deaths are permanent if the death was either Just or Heroic. So, it only counts if you were actively being a Hero or a Villain.

1) That seems a little more like the domain of a Life player; Jane's abilities were supposed to cover this role but the Condesce had other plans. However! It appears that the Ring of Life is lost in the fires of LOFAF. This will allow the Ring of Void to be found. Such a powerful artefact in the hands of a Void player might be enough to allow Roxy to conjure up multiple copies of Life Rings... maybe?

2) It looks like he was simply obscured by the glitches much like someone would disappear under a wave at the sea. The glitches are in fact caused by Caliborn. He stuffed the Act 6 Act 6 cartridge full of special stardust and slotted it into the computer to advance the plot. Amusingly enough, this problem can be solved by blowing wind into the session, NES cartridge style. John confirmed for MVP

3) Aranea confirmed that Caliborn is Lord English. That being said, how Caliborn chose the name is something we'll have to wait and find out...

4) (And replying to Phobos) Gamzee is definitely not dead, I agree, but I don't think that he God Tiered. If I recall correctly, if either the dream self or the real self God Tiers, both personas are merged and respawn either on Skaia or at the location of the quest bed. If this is correct and Gamzee did God Tier, then we wouldn't have the double Gamzee shenanigans going on.

Since a couple of these theories started with me, I can fill in the blanks.

3) The theory that Caliborn is not Lord English. As has been pointed out already, Caliborn is a wimp. Seriously. Can you see that petulant little wuss turning into the scourge of the universe? Also, Caliborn can't shut his mouth for more than three consecutive seconds, where Lord English has only really spoken on one occasion. They just do not seem like the same guy, at all.

Now, I don't know if there actually is any connection to Jake, other than the name, and I don't have an actual theory for who might turn into LE (at least not one that I am happy with).

4) Dear, sweet Gamzee. Not gonna lie, he is my favorite character. Both of him. That's right, I believe that there are two Gamzees running around.

How does that make any sense? Allow me to kick the wicked educating you.

It all comes down to this: Andrew Hussie says he is "personally not aware of a single timeline in which this codpiece packing moron dies". I take that to mean that both Gamzee and his dream self are running around somewhere. This is backed up by the fact that no dream Gamzee shows up for the mini-strife.

"But, Derrick," I can hear you saying. "If Gamzee and his dream self are both alive, then where has his dream self been hiding?" First off, how do you know my name? Second, that is a good question. The answer is, of course, in plain sight.

Consider what we know:
-Gamzee appears one of two ways: In shadow, where he is angry and talks in the usual dark tones, or in God Tier regalia, where he is happy and never says anything but honk (the narrator does all his talking for him).
-We get conflicting accounts of who and what Gamzee is. The most notable is whether he is God Tier or not.
-Gamzee claims to be both of the Mirthful Messiahs
-Caliborn can't kill him, try as he might.
-He is a rascally clown. This is very important.

Gamzee is the dark one who talks. He is not a God Tier, and he is only one of the Mirthful Messiahs. The happy one who doesn't talk is Gamzee's dream self. He IS a God Tier (which is why Caliborn can't kill him) and is the other Mirthful Messiah.

How did this come to be? Well, that has an especially easy explanation. Gamzee is who he has always been (moreso since he ran out of slime pies), and his dream self became a God Tier when Bec Noir destroyed the Troll's Prospit. He was napping on his stone slab in the core of the moon, which allowed him to Ascend (they do love to nap in uncomfortable places).

So, where do we see the different Gamzees in action?

Dream Gamzee took a meteor trip through a Skaia portal to Earth and became the guardian of the Cherubs in their infancy, and a guide for Caliborn later.

Gamzee took a trip through time (using Aradia's crystal time tables) to guide the kids and prototype the Trolls. He met up with and talked to John, which is what John doesn't want to bring up with Terezi when they meet up on LOLAR.

So, there's that. Now let me get into the theory that Gamzee is every class and every aspect, by nature of being a Bard.

I can make a case for Gamzee acting as just about every class and every aspect at one point or another in the comic.

Thief of Void and Prince of Light- He stole Equius's blood and used it to redact the knowledge in Callie's book.

Knight of Heart and Witch of Mind - He has turned Karkat's feelings for Terezi against him, and has manipulated Terezi's decisions.

Heir of Time - He "inherited" the time-tables from Aradia to travel forward in time.

Page of Breath and Seer of Doom - He seems to know when things are going to go down, and he always knows what to do.

In the end, all of this will serve to bring the group together when they need it the most (Maid of Blood) to fulfill the Bard of Rage's inverse goal, to mend the path to victory (Sylph of Hope).

I could go on, but it is late and I am tired. Maybe more later.

-Phobos, spending way too much time on theories since 1986